linux-kernel - [PATCH 0/5] xfs refcount conversions

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Date:   Fri, 20 Oct 2017 14:07:53 +0300
From:   Elena Reshetova <elena.reshetova@...el.com>
To:     darrick.wong@...cle.com
Cc:     linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        peterz@...radead.org, keescook@...omium.org,
        Elena Reshetova <elena.reshetova@...el.com>
Subject: [PATCH 0/5] xfs refcount conversions

Note: our previous thread didn't finish in any conclusion, so
I am resending this now (rebased at latest linux-next) to revive
the discussion. refcount_t is slowly becoming a standard for
refcounters and we would really like to make all conversions
done where it is applicable.

******

This series, for xfs, replaces atomic_t reference
counters with the new refcount_t type and API (see include/linux/refcount.h).
By doing this we prevent intentional or accidental
underflows or overflows that can lead to use-after-free vulnerabilities.

The patches are fully independent and can be cherry-picked separately.
If there are no objections to the patches, please merge them via respective trees.

Elena Reshetova (5):
  fs, xfs: convert xfs_bui_log_item.bui_refcount from atomic_t to
    refcount_t
  fs, xfs: convert xfs_efi_log_item.efi_refcount from atomic_t to
    refcount_t
  fs, xfs: convert xlog_ticket.t_ref from atomic_t to refcount_t
  fs, xfs: convert xfs_cui_log_item.cui_refcount from atomic_t to
    refcount_t
  fs, xfs: convert xfs_rui_log_item.rui_refcount from atomic_t to
    refcount_t

 fs/xfs/xfs_bmap_item.c     |  6 +++---
 fs/xfs/xfs_bmap_item.h     |  2 +-
 fs/xfs/xfs_extfree_item.c  |  6 +++---
 fs/xfs/xfs_extfree_item.h  |  2 +-
 fs/xfs/xfs_linux.h         |  1 +
 fs/xfs/xfs_log.c           | 10 +++++-----
 fs/xfs/xfs_log_priv.h      |  2 +-
 fs/xfs/xfs_refcount_item.c |  6 +++---
 fs/xfs/xfs_refcount_item.h |  2 +-
 fs/xfs/xfs_rmap_item.c     |  6 +++---
 fs/xfs/xfs_rmap_item.h     |  2 +-
 11 files changed, 23 insertions(+), 22 deletions(-)

-- 
2.7.4